Brake cooling device



Oct. 27, 1942. T. P. CHASE &299,796

BRAKE COOLING DEVI CE Fild Oct. 28, 1959 nnentor Patented Oct. 27, 1942 &299,796

Theron P. C haSe, Detroit, Mch., assignor to General Motors Corporation, Detroit, Mch., a corporation of Delaware Application October 28, 1939, Seria] No. 301,710

'UNITED STATE 3 l Claims. (Cl. 301-6) This invention relates to brakes and particui larly to brakes associated with vehicle Wheels.

The object of the invention is to provide cooling means to carry away the -heat resulting from the friction between the fixed and the rotating members of the brake.

Other objects will be understood scription which follows:

The invention is illustrated on the accompanyfrom the deture having an apertured Circular base 43 and an annular .Wan 45 extending part way across v the region of the vanes and terminating in an inturned end 41. Against the end 41 is placed an apertured disk 49. The space between the base 43 and the disk 49 is "filled with some medium suitable to remove dust and foreign matter from the air passing therethrough. When the Wheel is rotating the vanes 39 draw air through the filter box and force it through the openings 33 in the Wheel disk and out through the channels ing drawing in which: 10 between the ribs of the brake drum.

Figure 1 is a transverse section through a Wheel In the modified form shown by Figure 3 th provided With the novel cooling means. vanes 39' are secured to the Wheel disk 'l instead Figure 2is a View in elevation, partly in section of to the ub cap 35'. In this case the same as seen from line 2-2 of Figure 1. filter box is used. As in the case already de- Figure 3 ls a section like that of Figu e 1 but scribed, rotation of the Wheel poduces a flow` of showing a slight modification. airfrom outside the Wheel through the central Referring to the drawing, numeral 5 is used to Opening Of the hub p through the disk Opening designate a wheelrim. It is secured to a Suitably 33 an out thro h he channels between the shaped Wheel disk 1 by fastening means 9. Disk ribs of the brake drum. In this form of the in- 'I is secured t th hub H b a fastenng means vention there is shown an equivalent of plate 3! l3. These"`fastening means, bolts 13, also serve Of Fgure 1. It takes the form Of a D ate to secure to the hub the brake attaching latei Which is Dressdtted over the ribS instead of being to which is attached the annular friction ring fastened to he Wheel y the r Ve S 9- IT. A cover plate [9 secured to the non-rotating I claim:

axle 2I is also illustrated. Numeral 23 is used to 25 In combnation, a hee bra e' means nidentify a conventional Wheel .cylinder of a hy- Cluding a drum secured theretoy wheel havdraulic brake applying system which is used for s as a p thereof a hub `w n Openin efiecting the frictional engagement With the drum therethroueh. d dr m hav n a p r y of brake Shoes, one of which is marked 25. The external radial ri an ar m mber Sur Shoes are provided With friction facings 21 as roundg a d bs. air current creatin ea s usual. As is frequently the case the annul r acting in response to Wheel rotation and includdrum is formed With radial ribs 29 to facilitate s a Series f v n arri y Said Wheel oooling. draw air through said hub cap opening and In accordance with this invention the cooling d harge it over Said drum. ribs not onl rovide additional area for expo- 2. In combnaton, a W e br ke means insure to the air but the spaces between the ribs Cllldng a drllm secured t e o. Sa d Wheel havserve as channels for the flow of air. To confine v ing as a p thereof a hub p t an pe the flow to these channels a cylindrical ring 3l oug sa d drum having a plurality of is secured to the Wheel disk by the fastening external radial ribs. air current creating means means g. d t ring 31 li th b as acting in response to Wheel rotation and includshown. Openings 33 are formed in the Wheel s a e e of v e carried by d Wheel to disk for the passage of air from -a source to be dra'W air through Said hub ap Opening a d described to the channels between the ribs of the discharge it over Said drum and between said drum. n ribs.

The Wheel is provided with a relatively large 3. In combnation. a W ee br ke means inhub cap 35 hich is removabiy secured to the cluding a drum secured thereto, Said Wheel havdisk in any convenient way. The present inveng as a part thereof a hub cap with an opening tion makes use of this hub cap as an inlet for the e rough, said drum having a plurality of exthe current of air which is to Cool the drum. ternal radial ribs, an annular member surround- The hub cap has a comparatively large central g S ribS an forming W Said rbs closed opening around the margin of which the metal is axially extending tubular passag'es; air current inturned as at 31. To this inturned flange are creating means acting in response to Wheel rotasecured a pluralit y of Vanes 39 secured at their tion and including a seres Of v s c ed by axially inner ends to a tie plate 4l Mounted in said Wheel to draw air through said hub cap the opening of the hub cap is a box-like Struc- 5b Opening and discharge t ough Said passages.

THERON P. CHASE. 

